SU895681A1 - Formwork for producing tubular articles - Google Patents

Description

(54) FORMWORK FOR MANUFACTURING TUBULAR PRODUCTS FROM CONCRETE MIXTURES

I

This invention relates to the manufacture of precast concrete and reinforced concrete products.

Known formwork for the manufacture of tubular products from concrete mixtures, containing a base with a core rigidly fixed on it, a pallet with lugs and an outer form 11, which is composed of half-molds.

The closest technical solution of the known is formwork for the manufacture of tubular concrete products, comprising a base with a core mounted on it and a stand hinged to the bottom half-molds, and an annular pallet 2,

A disadvantage of the known devices is the great complexity of the extraction of the molded product.

The aim of the invention is to reduce the laboriousness of extracting a molded product.

This goal is achieved by the fact that the formwork for the manufacture of tubular products from concrete mixtures, containing the base with the core mounted on it and the rack, hinged to the half-molds.

supported by rollers on the base, and the annular pan, provided with a vertical drive and moved the pallet and the stripping device in the form of power cylinders and connected to the last two shoulders, the free ends of which are fixed, on the half-form, and the drive vertical movement of the pallet

 made in the form of power cylinders, and the base - with pockets for installing the latter.

On fkg. 1 schematically depicts the proposed obashubka for the manufacture of tubular products from concrete

mixtures; in fig. 2 is the same, the view in FIG. 3 shows section A-A in FIG. The formwork for the manufacture of tubular concrete products consists of a base 1 on which a core 2 and a stand 3 are rigidly fixed. To the stand 3 with two double-shouldered levers 4, two half-hinges are attached, which form the outer shields 5

25 formwork. Shields of formwork are rigidly attached to one end of the double-arm levers 4. At the other free end of them axial holes are made through which the axis passes - beam 6. Between the beam and hydraulic cylinders 7 are located 7 with the adjusting device 8. The beam 6 ensures synchronism {drive and uniform transmission Its external forces boards 5 through two shoulders levers 4. The external boards of the formwork 5 rest on the base I through the arcuate guide 9 with the help of rollers 10 that can be rotated. The formwork panels 5 at the joints are made with longitudinal flanges 11. The coupling surface of the flanges of one of the panels 5 is made wedge-shaped 12. In addition, on the connecting surface of the flanges 11 perform uschnitnye device 13 in the form of a gasket or sometimes ash. Screw fasteners 14 are attached to the flanges 11. The base pockets have vertical pockets 15 for fastening the power cylinders 16 for driving the vertical movements of the ring pallet 17 from the socket part 18 and the projections 19 with attachments for coupling to the load-lifting hoses (conditionally not shown)

In the outer panels 5 and the core 2, cavities are formed for supplying the heat transfer fluid during the heat treatment of the molded product.

For the convenience of stripping the finished product, the core 2 is made with a technological bias. On the ring pallet 17 is fixed rubber seal 20.

A device for making concrete tubular products works as follows.

The base 1 is installed on the vibrating table 21, and then the ring pallet 17 is laid on the base 1, the core passes through the central window of the latter, and the projections 19 are located above the pockets 15 with the power cylinders 16.

Then, the outer shields 5, the core 2 and the annular pallet 17 are lubricated, the reinforcement cage is installed in the formwork and the outer shields 5 are closed with the help of the power cylinders 7 and fixed in the closed position with screw clamps 14, ensuring the tightness of the joints.

After that, the vibrating table 21 is turned on and concrete is fed into the formwork

mixture. After vibrocompaction of the concrete mixture, steam is injected into the cavities of the outer shields and core 2, and the molded product is heat-treated until stripping strength is achieved. Then the steam supply is stopped, the outer shields 5 are opened by the power cylinders 7 and with the help of the power cylinders 16 the annular pan 47 together with the molded product is pushed upwards by 3001000 mm and transported by means of a lifting device to the post of heat treatment, and the annular pan 17 is again mounted on the base 1 and the molding cycle is repeated.

The use of the proposed opaluks in the production of tubular products will reduce the complexity of the processes of stripping and Reduce the duration of the cycle of molding products.

Claims (2)

1. A formwork for the manufacture of pipe products from concrete mixtures, comprising a base with a core mounted on it and a stand hinged to half-molds supported by rollers on the base, and an annular pallet, characterized in that, in order to reduce the laboriousness of extracting the molded product , is equipped with a drive of vertical re-delivery of the pallet and a stripping device in the form of power cylinders and connected to the last two shoulder arms, the free ends of which are fixed on the half-shapes. 2. The formboard according to claim 1, that is, that the drive is vertical so that the drive of the vertical movements of the pallet is made in the form of cylinders, and the base with pockets for installing the latter. Sources of information taken into account in the examination 1. Author's certificate of the USSR 677938, cl. B 28 B 21/82, 1976. 2. Authors certificate of USSR 2762460, c. In 28 V 21 / 82,07.05. 1979 but fi s 7 7 th "& / / Y P